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LCWO Discussion Forum [Atom LCWO Forum Feed]

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Thread: What is 4 dashes ?

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AuthorText


Posted: 2021-09-14 21:49
Is it two letters CH (Charlie Hotel) ?


Posted: 2021-09-14 22:37
Edited to add
https://en.wikipedia.org/wiki/Morse_code

see extensions - Letters, numbers, punctuation, prosigns for Morse code and non-Latin variants

half way down the page

- - - - is "shared"

Shared by CH, Ĥ, Š


https://en.wikipedia.org/wiki/Ch_(digraph)
https://en.wikipedia.org/wiki/%C4%A4
https://en.wikipedia.org/wiki/%C5%A0

and

ko コ ▄▄▄ ▄▄▄ ▄▄▄ ▄▄▄ https://en.wikipedia.org/wiki/Ko_(kana)


Posted: 2021-09-14 22:41
Repost instead of skill share :(


Posted: 2021-09-14 22:44
WGF:
Repost instead of skill share :(


Well it's all Dutch to me . .


Posted: 2021-09-14 22:55
B, C, F, J, L, P, Q, V, X, Y and Z - eleven basic letters (almost half of alphabet) coded by complex mix of 4 signs. And nobody cares about how simple is four dashes?


Posted: 2021-09-14 23:29
"International" morse is essentially German, for use by German commercial telegraph networks.
https://en.wikipedia.org/wiki/Friedrich_Clemens_Gerke

Cost was important and zeit ist gelt so allocations were made to increase cost effectiveness and thereby efficiency.

Letters are made of four components ( dits or dahs )
Number digits of five
Punctation of six
Prosigns ( procedure "signs" ) of two letters run together
SOS of nine components
( the original German SOS was originally SES or 7 dits in a row = not very distinguishable. I suppose German telegraph offices don't sink very often )

For letters, the sequences were listed in increasing length of time needed to send all the components
and
allocated to the letters with the most common letters getting the shortest.

All ordinary letters were allocated up to the combinations of three dahs and a dit.

The fact that four dashes sounds simple when you are learning apparently did not weigh against the extra time needed to send it.


Good luck with your morse lessons ( if you need it )

cb


Posted: 2021-09-15 11:55
cb:
four dashes sounds simple when you are learning apparently did not weigh against the extra time needed to send it.

Dot - 1 unit
Dash - 3 units
Space between dot and dash - 1 unit
Space between letters - 3 units

Letter H consist of 4 dots 3 spaces and 2 letter spaces = 4+3+(2*3)=7+6= 13 units to send H.
Letter C consist of 2 dots, 2 dashes, 3 spaces and 2 letter spaces = 2+(2*3)+3+(2*3)=2+6+3+6= 17 units to send C.
To send CH in two letters you need 13+17 minus 1 letter space=30-3= 27 units.
Four dashes = (4*3)+3 spaces+2 letter spaces=12+3+(2*3)=15+6= 21 unit to send CH in one letter.

27-21=6 units less if you send it by one letter
Also four dashes is better recognisable


Posted: 2021-09-15 12:59
Ah - OOPs the links I sent were to the charachter page, missing out the morse code page

I edited my first post . .



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